Fig. 2. HR and HR variability for a 32-year-old Zen nun during Zazen. Top, HR. Bottom, Spectral power. BPM = beats/min; HF = high frequency; LF = low frequency; IHR = instantaneous heart rate.
Fig. 2. HR and HR variability for a 32-year-old Zen nun during Zazen. Top, HR. Bottom, Spectral power. BPM = beats/min; HF = high frequency; LF = low frequency; IHR = instantaneous heart rate.